#include <stdio.h>

int main()
{
   char buffer[1024];

   if (getenv("VULN") == NULL) {
      fprintf(stderr,"Try Again!!\n");
      exit(1); }

   strcpy(buffer, (char *)getenv("VULN"));

   printf("Environment variable VULN is:\n\"%s\".\n\n", buffer);
   return 0;
 }

